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25 lines
457 B
Go
25 lines
457 B
Go
package client
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import (
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"sync/atomic"
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)
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// TryLock implement the classic "try-lock" operation.
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type TryLock struct {
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n int32
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}
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// Lock tries to lock the try-lock. If successful, it returns true.
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// Otherwise, it returns false immedidately.
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func (c *TryLock) Lock() error {
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if !atomic.CompareAndSwapInt32(&c.n, 0, 1) {
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return errDoubleLock
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}
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return nil
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}
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// Unlock unlocks the try-lock.
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func (c *TryLock) Unlock() {
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atomic.StoreInt32(&c.n, 0)
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}
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